ringct: remove duplicate rv.mixRing = mixRing; in genRctSimple

src/ringct/rctSigs.cpp

@@ -940,7 +940,6 @@ namespace rct {
             sc_add(sumpouts.bytes, a[i].bytes, sumpouts.bytes);
             genC(pseudoOuts[i], a[i], inamounts[i]);
         }
-        rv.mixRing = mixRing;
         sc_sub(a[i].bytes, sumout.bytes, sumpouts.bytes);
         genC(pseudoOuts[i], a[i], inamounts[i]);
         DP(pseudoOuts[i]);